login
A349677
Numbers k such that 3 * reversal(k) + 1 = k.
0
742, 7425742, 783742162, 74257425742, 7421625783742, 7837425742162, 742574257425742, 783783742162162, 74216257425783742, 74257837421625742, 78374257425742162, 7421621625783783742, 7425742574257425742, 7837421625783742162, 7837837425742162162
OFFSET
1,1
COMMENTS
It seems that this sequence consists of all numbers A that can be generated (recursively) by the following procedure: A -> 742 | 742B742 | 783A162 and B -> 5 | 162B783 | 5A5.
FORMULA
k = 3*reversal(k) + 1.
CROSSREFS
Cf. A004086.
Sequence in context: A188483 A235675 A235445 * A119595 A289141 A345547
KEYWORD
nonn,base
AUTHOR
Tanya Khovanova, Nov 24 2021
EXTENSIONS
a(12)-a(15) from Jon E. Schoenfield, Nov 25 2021
STATUS
approved